Gas-holder



I16, FRARY.

. GAS HOLDER.-

APPLIICATION FILED MAR.31, 1919. RENEWED FEB. 5, 1920.

Patented Apr. 20, 1920.

avwewboz attouwq U I ED STATES PATENT OFFICE.

Specification of Letters Patent.

rnA oIs c. rnamr, or rrrrsnonen, PENNSYLVANIA.

GAS-HOLDER.

Application filed March 81, 1919, serial No. 286,391. Renewed February 5, 1920. Serial No. 356,418.

V To all whom may concern:

Be it known that I, FRANCIS C. F BABY, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Gas-Holders, of which the following is a specification.

This invention relates to gas holders'of the type wherein an inverted bell forming the holder floats in a sealing liquid. When corrosive gases such as chlorin are to be Stored under constant pressure such as is produced by a gas holder comprising a floating bell, practically the only liquid which is adapted for sealing such a holder is a substance such as sulfuric acid, which does not attack steel if very concentrated, but does if diluted with water. ,If sulfuric acid is used to seal a holder of the ordinary type, the points at which the sealing acid is exposed to the air will be rapidly eaten through on account of the dilution of the acid by the moisture absorbed from the air. In order to obviate this difiiculty, gas holders for chlorin have been constructed of lead, or of steel completely covered with lead, but in either case the construction is very expensive and troublesome.

It is an object of'this invention to so protect the acid from the air that it cannot absorb moisture, and thus permit the use of steel without danger of corrosion. This I accomplish by totally inclosing the acid in a suitable tight container, of such size and shape as not to interfere with the rise and fall of the gas holder, and connected by means of a suitable pipe to a drying apparatus such as a sulfuric acid drying tower, so that air drawn into the container by the sinking of the holder is dried by passing through the tower, and thusprevented from diluting the acid in the seal.

The simplest means I have devised for this purpose consists in vertically extending the walls of the tank which contains the sealing acid to'a height slightly over twice the depth of the acid seal, and tightly afiixing a domed top, preferably containing a tightly closed manhole for inspection purposes. Asuitable opening is provided in th1s extension, at some point above the acid level, for attaching a pipe which leads to a sulfuric acid drying tower of any convenlent design or to other suitable apparatus for drying the air passing into the space above the acid in the, holder.

In order to decrease the amount of sealing ac d required, the tank which contains it is preferably made of an annular shape, the inner walls being suitably braced to withstand the pressure of the acid. Suitable inlets and outlets for chlorin and acid are of course provided, and also an indicator for showing the height of the holder.

The figure of the accompanying drawing illustrates diagrammatically a holder constructed in accordance with my invention.

An ordinary inverted bell l is set in its tank 2 and has the ordinary running gear to allow movement of the bell vertically. The sides 3 of the tank 2 are extended upwardly to approximately twice the depth of the sealing liquid which is preferably concentrated sulfuric acid, and is completely closed airti ht over the top of the bell by'a dome 4. M an-holes are placed at various points to allow convenient access to the interior of the inclosed dome. A pipe 6 connected to the extension 3 at point 7 above the liquid level, leads from the sulfuric acid drying tower 8 which dries the air entering the opening 9.

The air which fills the space 10 is always dry, having first been passed through the drying tower and being completely inclosed from any source of moisture, There is no possibility of water being absorbed by the exposed surface of the sulfuric acid which Patented Apr. 20, 1920.

seals the inverted bell thus preventing cor- .terized by means for drying the air coming 5. 'A gas holder containin an acid scaling in contact with the surface of said 'sealing liquid, having the sides of t e acid tank ex- 10 liquid. tended upwardly and closed at the top so as 4. A gas holder containing an acid sealing to completely inclose the inverted bell and 5 liquid, having the sides of the acid tank exrunning gear of the holder, and connected tended upwardly and closed at the top' so as to a source of dry air.

to completely inclosethe inverted bell and a running gear ofthe holder. a FRANCIS C. FRARY. 

